FORM 3
        
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

OMB APPROVAL
OMB Number: 3235-0104
Estimated average burden
hours per response...
0.5
                      
Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Li Dean Y
2. Date of Event Requiring Statement (MM/DD/YYYY)
1/1/2021 

3. Issuer Name and Ticker or Trading Symbol

Merck & Co., Inc. [MRK]
(Last)        (First)        (Middle)

MERCK & CO., INC., 2000 GALLOPING HILL ROAD
4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                          _____ 10% Owner
___X___ Officer (give title below)        _____ Other (specify below)
Executive VP & President, MRL /
(Street)

KENILWORTH, NJ 07033      

(City)              (State)              (Zip)
5. If Amendment, Date Original Filed(MM/DD/YYYY)
 

6. Individual or Joint/Group Filing(Check Applicable Line)

_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 7170.093 (1)D  

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(MM/DD/YYYY)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Unit 5/4/2019 (2)5/4/2021 Common Stock 694  (3)D  
Restricted Stock Unit 5/3/2020 (4)5/3/2022 Common Stock 1500  (3)D  
Restricted Stock Unit 5/1/2021 (5)5/1/2023 Common Stock 3090  (3)D  
Stock Option (Right to Buy) 5/5/2018 (6)5/4/2027 Common Stock 14265 $63.97 D  
Stock Option (Right to Buy) 5/4/2019 (7)5/3/2028 Common Stock 14638 $57.75 D  
Stock Option (Right to Buy) 5/3/2020 (8)5/2/2029 Common Stock 16936 $80.00 D  
Stock Option (Right to Buy) 5/1/2021 (9)4/30/2030 Common Stock 24165 $77.67 D  

Explanation of Responses:
(1) Holdings include shares acquired in dividend reinvestment transactions.
(2) These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/4/2019, 5/4/2020 and 5/4/2021.
(3) Each restricted stock unit represents a contingent right to receive one share of Merck & Co., Inc. common stock.
(4) These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/3/2020, 5/3/2021 and 5/3/2022.
(5) These restricted stock units vest and are distributed as shares of Merck & Co., Inc. common stock in three equal installments on 5/1/2021, 5/1/2022 and 5/1/2023.
(6) The option became exercisable in equal installments on 5/5/2018, 5/5/2019 and 5/5/2020.
(7) The option vests and becomes exercisable in three equal installments on 5/4/2019, 5/4/2020 and 5/4/2021.
(8) The option vests and becomes exercisable in three equal installments on 5/3/2020, 5/3/2021 and 5/3/2022.
(9) The option vests and becomes exercisable in three equal installments on 5/1/2021, 5/1/2022 and 5/1/2023.

Remarks:
See Exhibit 24 - Power of Attorney

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Li Dean Y
MERCK & CO., INC.
2000 GALLOPING HILL ROAD
KENILWORTH, NJ 07033


Executive VP & President, MRL

Signatures
/s/ Kelly Grez as Attorney-in-Fact for Dean Y. Li1/7/2021
**Signature of Reporting PersonDate

Grafico Azioni Merck (NYSE:MRK)
Storico
Da Mar 2024 a Apr 2024 Clicca qui per i Grafici di Merck
Grafico Azioni Merck (NYSE:MRK)
Storico
Da Apr 2023 a Apr 2024 Clicca qui per i Grafici di Merck